National Instruments 373392C-01 User Manual download pdf (Page 166)

Glossary

Measurement Studio User Manual G-2 ni.com

button A control used to input or display Boolean information or to initiate an

action in a program.

channel 1. Physical—a terminal or pin at which you can measure or generate an

analog or digital signal. A single physical channel can include more than

one terminal, as in the case of a differential analog input channel or a digital

port of eight lines. The name used for a counter physical channel is an

exception because that physical channel name is not the name of the

terminal where the counter measures or generates the digital signal.

2. Virtual—a collection of property settings that can include a name, a

physical channel, input terminal connections, the type of measurement or

generation, and scaling information. You can define NI-DAQmx virtual

channels outside a task (global) or inside a task (local). Configuring virtual

channels is optional in Traditional NI-DAQ and earlier versions, but is

integral to every measurement you take in NI-DAQmx. In Traditional

NI-DAQ, you configure virtual channels in MAX. In NI-DAQmx, you can

configure virtual channels in either MAX or in a program, and you can

configure channels as part of a task or separately.

3. Switch—a switch channel represents any connection point on a switch.

It may be made up of one or more signal wires (commonly one, two, or

four), depending on the switch topology. A virtual channel cannot be

created with a switch channel. Switch channels may be used only in the

NI-DAQmx Switch functions and VIs.

chart To append new data points to the end of an existing plot over time.

client callback

In Web Forms, page calls back to the server without fully posting back.

Callbacks are asynchronous and are accomplished with XML-HTTP.

Client callbacks do not include postback data, and they do not force the

page to refresh. Client callbacks do require a browser that supports the

XML-HTTP protocol.

CodeBuilder LabWindows/CVI feature that creates code based on a

.uir file to connect

your GUI to the rest of your program. This code can be compiled and run

as soon as it is created.

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National Instruments 373392C-01 User Manual Page 166